
import java.util.*;
public class MapsEx {
	public static void main(String[] arg)
	{
		HashMap<String, String> st=new HashMap<String, String>();
		st.put("Evan","email1");
		st.put("Eugene", "email2");
		st.put("Adan","email3");
		
		System.out.println(st.size());
		st.remove("Evan");
		System.out.println(st.get("Eugene"));
		
		for(String s:st.keySet())
			System.out.print(s + " ");
		
		System.out.println("");
		
		for(String s:st.values())
			System.out.print(s + " ");
		
		System.out.println("");
		
		for(Map.Entry<String, String>pair: st.entrySet())
		{
			System.out.print(pair + " ");
		}
	}
}
